This page explains how Song Han Ngo (USATT# 219644)'s rating went from 800 to 793 at the Spttc Saturday Night League event from 8 Dec 2018. The links below take you to pages that describe various aspects of the rating processor.

The rating processor goes through 4 passes in order. The links take you to pages that provide detailed explanations of the calculations during each of the 4 passes.